Apache ActiveMQ has graduated from the Incubator to become a top level project (TLP) at Apache.
Apache ActiveMQ is a distributed messaging system which supports clients in Java (JMS), C++, Ruby, Python and other languages. Apache ActiveMQ is fast, provides many advanced features, and fully supports JMS 1.1 and J2EE 1.4. Apache ActiveMQ is released under the Apache License, Version 2.0.
For more information: http://activemq.apache.org/